package com.mmall.common;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * Created by MHT on 2017/7/5.
 */
public class TokenCache {

    public  static final String TOKEN_PREFIX = "token_";

    private static Logger logger = LoggerFactory.getLogger(TokenCache.class);
    //声明静态的内存块         本地缓存的初始化容量是1000
    private static LoadingCache<String,String> localCache = CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12, TimeUnit.HOURS)
                    .build(new CacheLoader<String, String>() {
                        //默认的数据加载实现，当调用get取值的时候，如果key没有对应的值，就调用这个方法进行加载
                        @Override
                        public String load(String s) throws Exception {
                            return "null";
                        }
                    });

    public static void setkey(String key,String value){
        localCache.put(key,value);
    }

    public static String getKey(String key){
        String value=null;
        try{
            value=localCache.get(key);
            if ("null".equals(value)){
                return null;
            }
            return value;
        }catch (Exception e){
            logger.error("localCache get error",e);
        }
        return null;
    }





}
